The symbol for magnesium is Mg, and sulfuric acid is a compound containing sulfur, oxygen, and hydrogen. Its formula is written: H2SO4. So we write Mg plus H2SO4. An arrow shows the direction of ...

Now, a new paper suggests that one of the world’s earliest writing systems may have been influenced by older symbols engraved on small cylinders. These stone “cylinder seals” helped our ...

After watching Tarkovsky's film "Andrei Rublev" you will write an essay about a symbol used in it. Here is a paragraph about symbols from the Princeton Encyclopedia of Poetry and Poetics by Preminger, ...